Weegy: (5x3 + 3x2 - 5x + 4) + (8x3 -5x2 + 8x + 9) = 13x^3 2x^2 + 3x + 13
User: Add: 2a3 + 5a - 7 and 5a2 - 6a + 12
User: Subtract: 11a2 + 42a - 6 from 14a 2 - 24a + 7.
User: (-6.7x 2 + 2.3x y + 5.2) - (-14.9x 2 - 3.5x y + 7.1)
User: (6x + 1)(5x + 8)
User: (5x2 - 7)(5x2 + 7)
User: (a - 6)(a 2 +6a + 36)
User: 9x 2 - 18x - 7 ÷ (3x + 1)
User: 3a 2 + 2a - 7 into 27a 4 + 18a 2 - 2a + 42
(More) 8
Subtract: 11a2 + 42a - 6 from 14a 2 - 24a + 7 is 3a^2 - 66a + 13.
14a^2 - 24a + 7 - (11a^2 + 42a - 6)
= 14a^2 - 11a^2 - 24a - 42a + 7 + 6
= 3a^2 - 66a + 13
Added 1/26/2016 12:32:14 AM
This answer has been confirmed as correct and helpful.
8
(-6.7x^2 + 2.3x y + 5.2) - (-14.9x^2 - 3.5x y + 7.1)
= -6.7x^2 + 2.3xy + 5.2 + 14.9x^2 + 3.5xy - 7.1
= 8.2x^2 + 5.8xy - 1.9
Added 1/26/2016 12:35:51 AM
This answer has been confirmed as correct and helpful.
8
(6x + 1)(5x + 8)
= 6x*5x + 1*5x + 6x*8 + 1*8
= 30x^2 + 5x + 48x + 8
= 30x^2 + 53x + 8
Added 1/26/2016 12:36:30 AM
This answer has been confirmed as correct and helpful.
8
(5x^2 - 7)(5x^2 + 7)
= 5x^2*5x^2 - 7*5x^2 + 5x^2*7 + (-7)*(-7)
= 25x^4 - 35x^2 + 35x^2 + 49
= 25x^4 - 49
Added 1/26/2016 12:39:37 AM
This answer has been confirmed as correct and helpful.
8
9x^2 - 18x - 7 ÷ (3x + 1)
= (3x - 7)(3x + 1) ÷ (3x + 1)
= 3x - 7
Added 1/26/2016 12:41:44 AM
This answer has been confirmed as correct and helpful.